Some IoT devices are able to operate for years on a single battery, but there is demand for devices that will operate even longer, or with much smaller power sources. Some experimental technologies hold the promise of (almost) perpetual power. Powering small remote Internet of Things (IoT) devices such as sensors that can’t be connected to an external power source has been one of IoT’s big challenges: you don’t want to be changing the battery on a buried parking sensor or water meter every year.GUEST WRITERREAD MORE

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